Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes
Navarro, R; Guzman, J; Saucedo, I; Revilla, J; Guibal, E
HERO ID
1250955
Reference Type
Journal Article
Year
2007
Language
English
PMID
| HERO ID | 1250955 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes |
| Authors | Navarro, R; Guzman, J; Saucedo, I; Revilla, J; Guibal, E |
| Journal | Waste Management |
| Volume | 27 |
| Issue | 3 |
| Page Numbers | 425-438 |
| Abstract | In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching processes (acidic and alkaline treatments), followed by a second step of metal recovery from leachates involving either solvent extraction or selective precipitation. Despite a lower leaching efficiency (compared to sulfuric acid), sodium hydroxide was selected for vanadium leaching since it is more selective for vanadium (versus other transition metals). Precipitation was preferred to solvent extraction for the second step in the treatment since: (a) it is more selective; enabling complete recovery of vanadate from the leachate in the form of pure ammonium vanadate; and (b) stripping of the loaded organic phase (in the solvent extraction process) was not efficient. Precipitation was performed in a two-step procedure: (a) aluminum was first precipitated at pH 8; (b) then ammonium chloride was added at pH 5 to bring about vanadium precipitation. |
| Doi | 10.1016/j.wasman.2006.02.002 |
| Pmid | 16563726 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |
| Is Qa | No |